Animal-shears.



PATENTED MAY '26, 1908.

W .M. GAHILL. ANIMAL SHEARS-. APPLICATION FILED MAY 25. 1997.

1 Hi Ii a Q INVEWTOR:

WITNESSES.

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No. 888,867. PATENTED MAY 26, 1908.

W. M. OAHILL. ANIMAL SHEARS.

APPLICATION FILED MAY 25, 1907.

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WALTER M. CAHILL, OF WINONA, MINNESOTA.

ANIMAL-SHEARS.

Application filed May 25, 1907.

Specification of Letters Patent.-

Patented May 26, 1908.

Serial No. 375,574.

To all whom it may concern:

Be it known that I, IVALTER M. OAHILL, a citizen of the United States, residing at Winona, in the county of Winona and State of Minnesota, have invented a new and useful Animal-Shears, of which the following is a specification.

This invention relates to animal-shears and more particularly to the class of such shears known as clippers and used for shearing sheep.

The objects are, first, to provide an instrument of said class in which the wear and the grinding of the parts will not disturb the close fitting of the cutting edges, but will leave them always in good cutting contact, secondly, to provide improved means for exchanging small and large cutters while retaining the main parts of the device; and, third, to provide improved means for keeping the instrument well oiled. These and other objects I attain by the novel construction and arrangement of parts illustrated in the accompanying drawing, in which Figure 1 is a sectional side view of an animal shears embodying my invention, as on the line a a in Fig. 2. Fig. 2 is a top view of the device with the cap or covering of the mechanism removed. Fig. 3 is a side elevation of the cap removed from Fig. 2. Fig. 4 is a front end view of Fig. 3. Fig. 5 is a top view and Fig. 6 a bottom view of the cutter-actuator. Fig. 7 is a smaller and modified type of Fig. 5. Fig. 8 is a sectional View of Fig. 7 on the line bb.

Referring to the drawing by reference numerals, the body of the implement comprises a shell 1 with a .rearwardly extending cylindrical handle 2, and a forwardly projecting plate 3, all made preferably in one piece, which is offset at 4 to leave ample space between the handle and the body of the animal for the fingers of the hand holding the handle.

Journaled in the end walls 56 of the handle is journaled a shaft 7 driven by meshing miter gears 89, the latter of which is fixed on a shaft 10 adapted to be driven by any suitable power; said shaft is journaled in a sleeve 11, pivotally connected to the handle at 12 tangent to the pitch line of the gears, as is common in such devices;

In a recess 13 at the lower side of plate3 is secured by screws 14 the comb-plate 15, upon which oscillates the cutter plate 16, whose cutting blades 17 coact with the edges of the teeth 18 of the comb-plate in cutting the wool. The means by which the cutter plate is oscillated and always kept in close contact with the comb will now be described.

Upon the shell or chamber 1 is held by screws 19 and 20 a cover 21, in whose upper part is screw-threaded a journal bearing 23 having an overhanging circular flange 24 with serrations 25 engaging a spring arm 26 by which it is held in any adjusted position. In said bearing 23 and in a bearing 27 at the heel of plate 3 are journaled the ends of a vibrator shaft 28, on which is secured a twoarmed vibrator 2930, whose real arm 30 has its ends provided with a vertical channel, which is engaged for oscillation by a crank stud provided with a spherical roll operating in the vertical channel of a crank 33 formed on the front end of the shaft 7.

The lower end of the vibrator shaft is always suspended from the bottom of the lower bearing so that any downward pressure at the upper end of the shaft, as may be regulated by the turning of the cap 24, is sustained by the arm 29, which near its end has a ball-shaped finger 34 engaging in a pit 35 of an actuator 36, having three arms, 373839, of which arm 37 rests in an opening 40 in the front side of the vibrator shaft and arms 3839 rest upon the endblades of the cutter-plate 16, near which they have fixed pins 41 engaging holes in the cutter plate. The ball 34 does not, however, rest directly upon any part of the actuator, as the pit of the latter has no bottom, but it rests upon a pressure-equalizer or bar 42, which is inserted in a groove in the lower side of the actuator and rests with its rear end pivotally upon a bridge bar 43 of the actuator and is retained in the groove by a pin 44, while its front end is formed with two downwardly curved fingers 45 bearing upon the middle blades of the cutter plate, so that the pressure of the arm 29 is equalized upon the middle of each of the blades of the cutter plate, which is very important as the plate is very apt to become ground or worn lower at one end than at the other, and its segmental shape has a tendencyto let the wool raise the middle blades upward unless the downward pressure is thus equalized. It will also be observed that the ball 34 moves in a plane parallel to the comb by means of the vertical vibrator shaft, in contradistinction to other means formerly used, and which very soon gets out of order.

- brating it said means for adjusting compris- 3111 Fi 7 and 8 will be seen that instead of the bri ge bar 43 and pin 44 in Fig. 6 the equalizer may be held and supported by a single pin 46, and when a small comb, actuator and cutter plate are used, the latter usually has only three blades and then the equalizer may have onlyone finger 45 at its front end pressing upon the single middle, blade of the cutter plate. It is especially in such a modification that the pin 46 may be used as there are then not two fingers at the front end of the equalizer to require any rocking of it.

In Fig. 1 is shown that the cap of the journal 23 is provided with a chamber 47, which through an aperture 48 may be filled with cotton and oil, and in the bottom of the chamber is a small hole 49 for such oil to escape slowly into the journal below and lubricate it.

Having thus described my invention, what I claim is:

1. In animal shears and mounted in a suitable frame, the combination of a normally horizontal comb-plate, a cutter plate oscillating thereon and having blades coacting with the teeth of the comb-plate, a vertically disposed vibrator shaft rearwardly of the comb-plate and having near its lower end a forwardly disposed cavity and farther up a fixed vibrator arm with a ball-shaped end, an actuator having an arm resting in said cavity and two arms engaging the cutter plate and resting upon it near its ends, an equalizing bar guided in the underside of the actuator and engaging it pivotally with its rear end while the forward end has one or more fingers resting near the middle of the cutter plate, said actuator having an aper ture in which the ball of the arm engages and rests upon the e ualizing bar below, means for adjusting the vi rator shaft and means for viing a guiding ournal for the lower end of the vibrator shaft with clearing at the end of the shaft, and a guiding serrated ournal about the upper end of the shaft with bottom bearing upon the end of the shaft and screw-threads engaging the frame for adjusting the journal downward, and a spring arm engaging said serrations.

2. In an animal shears and mounted in a suitable frame, the combination of a normally horizontal combplate, a cutter plate oscillating thereon and having blades coacting with the teeth of the comb-plate, a vertically disposed vibrator shaft rearwardly of the comb plate and having near its lower end 1 means for adjusting the vibrator shaft and thereby its arm downward, and means for rocking the vibrator shaft, said vibrator shaft being at all times suspended in its journals by having said vibrator arm supported on the equalizing bar;

3. In an animal shears and mounted in a suitable frame, the combination of a nor mally horizontal comb-plate, a cutter plate oscillating thereon and having blades coacting with the teeth of the comb-plate, a vertically disposed vibrator shaft rearwardly of the'comb-plate and having near its lower end a forwardly disposed cavity and farther up a fixed vibrator arm with a ball-shaped end, an actuator having an arm resting in said cavity and two armsengaging the cutter plate and resting upon it near its ends, an equalizing bar guided in the underside of the actuator and engaging it pivotally with its rear end while the forward end has one or more fingers resting near the middle of the cutter plate, said actuator having an aperture in which the ball of the arm engages and rests upon the equalizing bar below, and means for adjusting the vibrator shaft downward, and means for rocking the vibrator shaft, said equalizing bar having a-rocking and a vertically vibrating movement in the actuator.

4. In an animal shears, the combination with a vibrating or rocking shaft, of a journal box embracing one end thereof, and having a bottom wall meetin 'the end of the shaft and in said bottom wall a chamber for lubrieating materials, said chamber having an oil hole toward the shaft and a larger opening outward for inserting and removing lubricants and materials used in connection therewith.

In testimony whereof I affix my signature, in presence of two witnesses.

I WALTER M. CAHILL.

Witnesses:

A. M. CARLSEN, D; E. CARLsEN; 

